Hi, I’ve been driving a V50 for a year and a few weeks ago I heard so tedious surren while driving. Maybe it’s normal, but I’d like to check the filling level of the servo oil, because maybe there’s not much in it anymore. After a long search I finally found the storage tank under the right headlight. Seems to be somehow part of the servo pump. But oh fright, when I unscrewed the lid, there was no trace rod integrated in the lid. I want to suck out the old oil and fill it up with new oil at some point. But how high? Everything is somehow not thought out by the car. Others have a nicely accessible reservoir with a knife. Does any of you have an idea? Greetings